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Steel Strong-Wall Shearwall - Wood Framing
Rev. Date: 10/21/2010
T-MSTRSSW09R Expires 01/2012
SECTION 06 12 19
SHEAR WALL PANELS
PART 1 GENERAL
1.1
SECTION INCLUDES
A.
1.2
RELATED SECTIONS
A.
B.
C.
D.
E.
1.3
Prefabricated steel based shear panels designed and constructed to support gravity loads and
resist lateral in-plane and out-of-plane wind or earthquake loads in wood-framed wall
construction.
Section 03 30 00 – Cast-In-Place Concrete – Concrete provides support or anchorage.
Section 04 05 00 – Common Work Results for Masonry – Masonry provides support or
anchorage.
Section 04 20 00 – Unit Masonry – Unit Masonry provides support or anchorage.
Section 05 12 00 – Structural Steel Framing – Steel provides support or anchorage.
Section 06 10 00 – Rough Carpentry – Wood supported by fastenings or providing support or
anchorage.
REFERENCES
ASTM A36 – Carbon Structural Steel
ASTM A449 – Hex Cap Screws, Bolts and Studs, Steel, Heat Treated
ASTM A500 – Cold Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds
and Shapes
D. ASTM A563 – Carbon and Alloy Steel Nuts
E. ASTM A653 – Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated
(Galvannealed) by the Hot-Dip Process
F. ASTM A1011 – Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength LowAlloy, High-Strength Low-Alloy with Improved Formability and Ultra-High Strength
G. ASTM F1554 – Anchor Bolts, Steel
H. SAE J78 – Self-Drilling Tapping Screws
I. ICC-ES AC130 – Acceptance Criteria for Prefabricated Wood Shear Panels
J. ICC-ES AC233 – Acceptance Criteria for Wood Screws
K. ICC-ES AC322 – Acceptance Criteria for Prefabricated, Cold-Formed Steel Lateral-ForceResisting Vertical Assemblies
A.
B.
C.
1.4
DELIVERY, STORAGE, AND HANDLING
A.
B.
Deliver products to job site in manufacturer’s or distributor’s packaging undamaged, complete
with installation instructions.
Protect and handle materials in accordance with manufacturer’s recommendations to prevent
damage or deterioration.
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PART 2 PRODUCTS
2.1
MANUFACTURERS
A.
2.2
MATERIALS
A.
B.
C.
2.3
Steel:
1. Sheet: ASTM A36, ASTM A653, ASTM A1011
2. Structural Shapes: ASTM A500
3. Fasteners: ASTM A36, ASTM A449, F1554, SAE J78
4. Nuts: ASTM A563, ASTM A194
5. Coupler Nuts: ASTM A563
Lumber:
1. Spruce-Pine-Fir, Stud Grade or Better, Minimum Specific Gravity 0.42
Finishes:
1. Electro-plated galvanized, G60, G90
2. Gray Paint
FABRICATION
A.
B.
C.
2.4
Manufacturer: Simpson Strong-Tie Co., Inc
Shop assembly to occur per the manufacturer’s approved production drawings.
Fabrication tolerances per manufacturer.
The manufacturer’s identification shall be stamped into the metal or wood part and a label
may be attached to the part with adhesive.
TESTING
A.
B.
C.
Testing to determine allowable loads shall be performed as per ICC-ES Acceptance Criteria
322 (AC322).
Testing shall be conducted under the supervision of an independent laboratory.
Manufacturer to provide code testing data on all products that have been code tested upon
request.
PART 3 EXECUTION
3.1
EXAMINATION
A.
B.
3.2
The panels shall be installed on supporting structural members per the manufacturer’s
instructions.
Verify that the dimensions of the supporting member are sufficient to receive the specified
panels.
INSTALLATION
A.
B.
C.
All specified fasteners must be installed according to the manufacturer’s instructions.
Install all specified fasteners before loading the prefabricated steel shear panel.
For all framing members wood shrinkage shall be taken into account.
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Do not overload by exceeding the manufacturer’s catalog allowable load values.
Use proper safety equipment.
Choose the correct template, from the manufacturer, required for proper bolt placement.
Do not cut the steel panel or enlarge the existing holes. Holes up to 1 1/8 inches may be
bored through the wood studs at any location corresponding to a hole in the panel flange.
H. The prefabricated steel shear panels shall be installed directly on concrete foundations, wood
floor systems, masonry foundations or walls, or steel beams per the manufacturer’s
instructions. There may be a reduction of allowable load if a prefabricated steel shear panel is
installed on a masonry foundation or a steel beam.
I. Field replacement of pre-attached wood studs is permitted if the replacement stud has the
same or greater dimensions and is attached to the steel panel with SDS ¼-inch-by-1 ½-inch
screws. The studs must be spruce-pine-fir stud grade or better. The studs must fit snugly
between the top and bottom plates and along the vertical face.
J. Prefabricated steel shear panels with 2x4 pre-attached studs may also be used in 2x6 wall
framing. Install with wall flush to one face of the framing and add furring to the opposite side.
K. Prefabricated steel shear panels may be installed with solid or multi-ply headers per the
manufacturer’s instructions.
L. Concrete installation: The prefabricated steel shear panel must be installed directly on a
concrete foundation over two anchor bolts per the manufacturer’s instructions. The panel
base plate must be secured to the anchor bolts with high strength or standard nut matching
the anchor bolt grade.
M. Masonry or steel installation: Installation of the prefabricated steel shear panels on masonry
walls or foundations or steel beams may be permitted, subject to the approval of the code
official based on calculations and details prepared by the registered design professional.
N. Wood floor installation: Installation of the prefabricated steel shear panels on a wood floor
shall be per the manufacturer’s instructions. The anchor rods must extend up through the floor
system, and solid blocking must be installed under the center and each end of the wall. The
floor sheathing must be bored or notched at each anchor rod to allow standard nuts to be set
flush with the top of sheathing. The panels must be placed over the anchor rods directly on
the floor sheathing and bear on the nuts. The shear transfer plate must be attached to the
panel with ¼-inch diameter or No. 14 self-tapping screws (provided with Wood Floor
Connection Kit) and to the rim joist with 10d common nails.
O. The top of the prefabricated steel shear panel must be attached to wood top plates or a beam
with SDS ¼-inch-by-3 ½-inch screws per the manufacturer’s instructions.
P. Garage Portal System: Installation of the prefabricated steel shear panels with the Portal
Frame Connection Kit (SSWP-KT), when specified by the registered design professional shall
be per the manufacturer's instructions. The SSWPS straps shall be attached to the steel
panel with #14 self-drilling screws (included with Portal Frame Connection Kit) and to the
wood header with 10d x 2 1/2" minimum nails. The header must span continuously across
the length of the panel. Single-wall portal header support shall be installed per the
manufacturer's instructions.
Q. Balloon Framing Installation: Install panels per the manufacturer’s instructions. The bottom
prefabricated steel shear panel must be an “-STK” model with factory installed hold-down
elements. The panels must be connected with threaded rods extending through the holddown element, lower wall top plate, and upper wall bottom plate. The panels must be secured
with double nuts at the panel to panel joint and a single nut at the bottom of the hold-down
element. A minimum of two nominal 2-by-6, spruce-pine-fir stud grade or better studs must be
installed on each side of the panel. Alternate full height members may be required by the
registered design professional. The attachment to the full height studs and at the top and
bottom of the balloon framed panels must be per the manufacturer’s or registered design
professional’s instructions.
R. Two-story stacked installation: Install panels per the manufacturer’s instructions. The bottom
prefabricated steel shear panel must be an “-STK” model with factory installed hold-down
elements. The panels must be connected with threaded rods extending through the holddown element, wood floor system, and upper wall bottom plate. The panels must be secured
with a standard nut at the top and bottom of the hold-down element. The remainder of the
upper panel installation shall be per Section 3.2N.
D.
E.
F.
G.
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S.
T.
3.3
The maximum shim thickness between the top of the prefabricated steel shear panel and the
top plates or header is 7/8-inch using SDS ¼-inch-by-3 ½-inch screws. Refer to
manufacturer’s instructions for information on greater shim thickness.
Anchor bolt nuts should be finger-tight plus 1/3 to ½ turn with a wrench. Do not use an impact
wrench to tighten nuts on the anchor bolts.
FIELD QUALITY CONTROL
A.
B.
Determine that the proper part is being used in the correct application and has been
fabricated by the approved manufacturer by observation of the stamp into the metal part
and/or the adhesive label on the product denoting part and manufacturer name.
Before substituting another brand, confirm load capacity based on published testing data and
calculations per Section 2.4. The engineer/designer of record shall evaluate and give written
approval for substitution prior to installation.
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